Ok, the next problem is that the back focus is 2mm above the end of the guide port, im going to have to get creative here, or extend the imaging train behind the guider so that i have a little extra focus to play with while using the 50mm extension tube on the guide port. (SEE ATTACHED DODGY PAINT DRAWING)
like this
http://www.bintel.com.au/Astrophotog...oductview.aspx
Thoughts?